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Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.
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ROT2 command of IRIS
Re: ROT2 command of IRIS
What is rate that slits vibrated
- Merlin66
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Re: ROT2 command of IRIS
John,
Around 30-40 oscillations per second is needed for persistence of vision, p 66-67.
Around 30-40 oscillations per second is needed for persistence of vision, p 66-67.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
Re: ROT2 command of IRIS
Maybe,for visual using oscillations is 20-30 per second vibration and for graphical using is 5-10 per second.
For photo it need not make vibrate so fast. Conposite procedure is useful for smoothing.
For photo it need not make vibrate so fast. Conposite procedure is useful for smoothing.
Re: ROT2 command of IRIS
Hi Merrill55,
I am sorry that the SLiM has some problem to process the avi files because it is using an external library to decode the avi format.
If you use the mono 8bit or 16bit SER file format to capture the video, it should be able to support without problem (I hope)
I was too lazy to implement the code for 16bit SER vertical mode, please make the spectral lines horizontally while using 16bit SER.
Also, using ROI function to reduce the video resolution can help improving the processing speed and also the capturing frame rate.
Thanks!
I am sorry that the SLiM has some problem to process the avi files because it is using an external library to decode the avi format.
If you use the mono 8bit or 16bit SER file format to capture the video, it should be able to support without problem (I hope)
I was too lazy to implement the code for 16bit SER vertical mode, please make the spectral lines horizontally while using 16bit SER.
Also, using ROI function to reduce the video resolution can help improving the processing speed and also the capturing frame rate.
Thanks!
Re: ROT2 command of IRIS
Thanks Wah.
I'm beginner in SHG. So I must learn more about dogital procedure.
ROi is helpful for me.
I tried Vdub and SLim recently.
I Try to more experience about DigitalSpectroheliograph.
Thank you.
I'm beginner in SHG. So I must learn more about dogital procedure.
ROi is helpful for me.
I tried Vdub and SLim recently.
I Try to more experience about DigitalSpectroheliograph.
Thank you.
- Merlin66
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Re: ROT2 command of IRIS
Toshio,
You may find the new book "Imaging Sunlight -using a digital spectroheliograph" useful.
It has a whole chapter on the various processing software currently available and how to use them for the SHG.
You may find the new book "Imaging Sunlight -using a digital spectroheliograph" useful.
It has a whole chapter on the various processing software currently available and how to use them for the SHG.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
Re: ROT2 command of IRIS
Trial h-alpha photo.
Very poor image.
Very poor image.
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- 2016_12_15
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- Montana
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Re: ROT2 command of IRIS
Wow! that's a great close up, well done 
Alexandra

Alexandra
Re: ROT2 command of IRIS
Thanks Alexandra.
I will try to get more detail the solar surface.
Toshio
I will try to get more detail the solar surface.
Toshio
Re: ROT2 command of IRIS
Toshio - do you know of any other SHG or SHS in Japan (amateur)
Re: ROT2 command of IRIS
I know one amateur. His name is Takashi Sakae. He is a teacher of high school.
I don't know any other amateur without him.
I don't know any other amateur without him.
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rtn2012_0018.pdf
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h24_05.pdf
- His article in 2012
- (455.93 KiB) Downloaded 71 times
Re: ROT2 command of IRIS
Very nice
Ken - guess you have to update total counter
Ken - guess you have to update total counter

- Merlin66
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Re: ROT2 command of IRIS
John,
Already done!!
I'll look at translating the documents.
Already done!!
I'll look at translating the documents.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
Re: ROT2 command of IRIS
My Christmas solar image is as follows;
Somewhat blur image.
Somewhat blur image.
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- 2016_12_25
- 09_03_29_K_002_K.jpg (169.87 KiB) Viewed 3746 times
- Montana
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Re: ROT2 command of IRIS
Wow!! some lovely filaments, well done and Merry Christmas! 
Alexandra

Alexandra
Re: ROT2 command of IRIS
Merry Christmas all.
Have a nice holy night !!
Toshio (a part of HYLOV P.233)
Have a nice holy night !!
Toshio (a part of HYLOV P.233)
Re: ROT2 command of IRIS
Picture improved
Enjoy
Enjoy

Re: ROT2 command of IRIS
Trial h-alpha photo by short SHG. 2016_12_31
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- 2016_12_31
- 12_19_28_000_OKK.jpg (53.28 KiB) Viewed 3625 times
Re: ROT2 command of IRIS
Much better
Focus improvement is noticeable
Focus improvement is noticeable
- Spectral Joe
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Re: ROT2 command of IRIS
Yes, it's shaping up. I see two immediate issues. First, there's a lot of stray light. This can be due to misplaced reflection traps, but in your case it's likely back reflections from the binoviewer. Second, there is noticeable vignetting in the direction along the slit, usually the result of not having the telescope objective imaged onto the grating. It's a common problem, fixed by using a field lens at the entrance slit. Overall, though. this is a very good start.
Observing the Sun with complex optical systems since 1966, and still haven't burned, melted or damaged anything.
Not blind yet, either!
Light pollution? I only observe the Sun, magnitude -26.74. Pollute that!
Not blind yet, either!
Light pollution? I only observe the Sun, magnitude -26.74. Pollute that!
- Montana
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Re: ROT2 command of IRIS
This is a massive improvement, that is a tremendous image

Alexandra


Alexandra
Re: ROT2 command of IRIS
Bartolick;
Yes,I should pay attention to stray light. I recognize it.
Littrow lens cause a strong ghost.(Acromatic lens cause four goast)
The binoviewer cause a strong ghost of the slit shape.
Therefore I block it using red filter (R64) in the lower part of the binoviewer.
When I use other wavelengths, the use of the color filter corresponding to each will be necessary.
The serious problem is not good quality collimator lens which light passes twice.
I must exchange on an apochromatic lens.
Probably I think that the image becomes a little sharper.
Yes,I should pay attention to stray light. I recognize it.
Littrow lens cause a strong ghost.(Acromatic lens cause four goast)
The binoviewer cause a strong ghost of the slit shape.
Therefore I block it using red filter (R64) in the lower part of the binoviewer.
When I use other wavelengths, the use of the color filter corresponding to each will be necessary.
The serious problem is not good quality collimator lens which light passes twice.
I must exchange on an apochromatic lens.
Probably I think that the image becomes a little sharper.
Re: ROT2 command of IRIS
Hi all;
Recent my SHG image.
Low contrast !!
Recent my SHG image.
Low contrast !!
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- Montana
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Re: ROT2 command of IRIS
Very nice prom in the south east

Alexandra


Alexandra
- marktownley
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Re: ROT2 command of IRIS
Very good!

http://brierleyhillsolar.blogspot.co.uk/
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